Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae92538cfa37caf4…

MALICIOUS

PDF

97.2 KB Created: 2021-09-16 19:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2a2f44b54be0bb80de8ddd1df3f3a4cc SHA-1: 38297d697ef532e29d7e8f6bd09acac70b8e88d4 SHA-256: ae92538cfa37caf43b80f96e2967703a920c787893048df518df7c243713361d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads or redirecting users to malicious sites. The heuristic firings indicate the PDF is part of a link farm on disposable hosting and points to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=think+and+grow+rich+pdf+in+english PDF link annotation
    • http://konferencii.org/js/ckfinder/userfiles/files/63317404138.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e0bd71a77---9021667600.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210906183304.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/dosiwofokoxekenilatid.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/bulavodiponinalumogige.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/dofidos.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/dofekanufokurujaragabivos.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/jujekajamomedaxesesemozon.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/pagavogosug.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/36655444901.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b98b7c112---bajuvisemobotodil.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/tojobipepo.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/40361368452.pdfIn PDF document text
    • https://clinicscrm.com/img/files/79651122734.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/93538052067.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/vukulasa.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/potazapitufegowixanizodum.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ar7a7ucnjqm5ud0u5i61jjt98c/vumafudutodipixerure.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/xisularugevagaluf.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/jikukikuwixosisuke.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/bexubawurejotaluf.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/fuladabirugizatemofabixor.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/zugemakoxaxixuxi.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/150eb1341dbb867c3e78bafd561d016b/wuwuvodapoderaka.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210911005806_1703970344.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/kemomenixolimilitebat.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/jifiwamuzowatekeze.pdfIn PDF document text
    • http://boldogelet.hu/media/nibosutukapavibuwulen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E5 10940 bytes
SHA-256: 9c4d78b16a5d4fa79b40bda7ba9d7424c8c48ede1fb86eeeccbe294b6f177cc5
font_01_sfnt_off00012f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14718 18164 bytes
SHA-256: 61eb463f373b282244fe0382805a663bf546c9486ca8d06667ef029fef73b70a

Open this report in the interactive analyzer, or submit your own file for analysis.